Your baby this week
Your baby now weighs about five and a quarter pounds and measures roughly eighteen inches long — about the size of a honeydew melon. And two quiet milestones deserve a celebration: your baby's kidneys are now fully developed, and their liver has begun processing some waste products. Your baby has been practicing the whole swallowing-and-recycling system for weeks — taking in amniotic fluid, processing it, and releasing it back — and now the machinery runs nearly as it will on the outside.
From here to the finish line, the story is mostly growth. Most of your baby's physical building is complete, and the final weeks are devoted to laying down fat — many babies gain roughly half a pound a week in this stretch — smoothing their skin, and letting the brain keep up its remarkable construction work. The lungs are nearly mature.
The skull bones remain soft and separate, cleverly designed to flex for the journey out. And your baby's grip, sucking, and breathing practice are all quietly rehearsing for opening day. The big change you can feel: room is tight now.
There is still amniotic fluid cushioning your baby, but far less free space than even a month ago. So instead of flips and sharp kicks, you'll feel rolls, pushes, stretches, and a small foot or elbow that seems to park itself under your ribs and stay for a visit. Many babies are head-down by now; some take their time settling, and your doctor keeps track of position at your visits — there is still room, and still time, for a baby to turn.
Your baby's senses are busy in there, too. Their eyes can open and close, and they may turn toward a bright light shining on your belly. Sounds are a whole world now — your voice, your partner's voice, music, the household orchestra — filtered through the watery walls, familiar and soothing.
And those sleep cycles include the rapid-eye-movement stage, the dream stage. What a nearly-born baby dreams about is one of life's loveliest mysteries — but warmth, rhythm, and your heartbeat are the safest guesses anyone can make. Your baby also has clearer sleep-and-wake cycles now, which is why you may notice the same active hours repeating day after day. Hold onto that observation — it becomes very important a little further down this page.
Your body & symptoms: the snug stage
And you, mama — week 35 has its own unmistakable feel. Your uterus now reaches high under your ribs, so breathlessness is at its peak: there is simply less room for your lungs to fully expand, and stairs, speeches, and big laughs all cost more air than they used to. Heartburn and indigestion often travel with it, since your stomach is sharing a very small neighborhood.
The flip side is coming soon — when your baby drops lower in a few weeks, breathing usually gets easier. The bathroom trips of the first trimester are back in force, because your baby is pressing on your bladder from every angle. Pelvic pressure and a heavy, carrying-low feeling are common, especially after time on your feet.
Braxton Hicks practice contractions tend to become more frequent and more noticeable now — irregular tightenings that ease when you rest, hydrate, or change position; think of them as rehearsals, and mention their pattern to your doctor if you're ever unsure which kind you're feeling. Backache, hip aches, and that wide-awake-at-3 a.m. sleep pattern round out the regular cast. Also on the week-35 roster: mild swelling in feet and ankles — feet up and ankle circles are the old faithfuls — itchy stretching skin, a touch of clumsiness as your balance keeps shifting, constipation and hemorrhoids from all that pressure, and possibly a little colostrum if your body is getting an early start.
And the emotional weather: many women describe swinging between cannot-wait excitement and cannot-believe-it's-real disbelief, sometimes within the same cup of tea. Add the nesting instinct, which may arrive like a friendly tornado, and you have week 35: uncomfortable, impatient, and quietly magnificent. Channel the nesting into lists and laundry, mama — then sit down. Rest is still on the to-do list, in bold.
The GBS test & your appointments now
Now for this week's headline appointment topic: the group B strep test — usually called the GBS test. Here's what it is, in plain language. Group B streptococcus is a very common type of bacteria that many healthy adults carry in their bodies without knowing it and without it making them sick.
It is not an infection you caught doing something wrong, and it usually causes no symptoms at all. The reason it matters in pregnancy is simply this: a baby passing through the birth canal can be exposed to it, and newborns have brand-new immune systems — so your team likes to know in advance. The test itself is simple and quick: usually somewhere between weeks 35 and 37, your doctor takes a gentle swab — a few seconds, no speculum drama — and sends it to a lab.
If your result is negative, nothing changes at all. If it is positive, the plan is equally calm: it simply means that IV antibiotics during labor become part of your birth plan, which is the standard, effective way to protect your baby during delivery. Nothing to fix now, nothing to worry about at home — just a note in your chart that makes your team ready.
If your test hasn't been mentioned yet, ask your doctor at your next visit when yours is scheduled; different practices time it slightly differently, and yours knows your situation. Meanwhile, the rhythm of care is picking up. Many practices move to weekly visits somewhere around week 36, and the familiar ritual continues at each one: blood pressure, urine, weight, the growth of your belly, your baby's heartbeat, and a feel for your baby's position.
Those blood pressure and urine checks keep screening for preeclampsia right up to the end — which is why showing up, even when you feel perfectly fine, is genuinely part of the care. These visits are also prime time for the final logistics. If you haven't walked through your birth preferences with your doctor yet, this is the week to do it — our Birth Plan post in this series helps you write that one calm page.
And if your birthplace offers pre-registration, this is a lovely week to get it done, along with a practice drive past the hospital entrance you'll actually use at 3 a.m. None of it is urgent today. All of it will feel like a gift later.
Movement now: different, but the pattern still rules
Now the topic we promised: your baby's movement in the final weeks. Expect the style to change. Sharp kicks and somersaults give way to rolls, pushes, stretches, and long slow shoves — there is simply less room for gymnastics, and your baby is bigger and stronger, so movements may feel slower but more powerful.
Hiccups continue too, in their own separate little rhythm. But hear this clearly, because it is one of the most repeated pieces of guidance in late pregnancy: different is normal — less is not. Your baby should keep moving on their own familiar pattern right up to birth — the same active times of day, the same wakeful sessions, the same personality you've come to know.
A quieter pattern is never something to explain away with "the baby is running out of room." Space changes how movement feels. It does not switch it off. So keep doing what you've been doing: learn your baby's pattern, tune in during their usual active times — after a meal, or in the evening, are classic busy hours for many babies — and settle in quietly, feet up or on your side, and just pay attention.
It isn't a test to pass; it's a few calm minutes of knowing your baby. And if you ever notice a clear decrease, or a pattern that feels different from your baby's normal, call your doctor the same day — right away, not tomorrow. Day or night, weekend or weekday.
Your team would rather check a healthy baby a hundred times than miss the one time it mattered, and they will tell you exactly that. Your awareness is one of the best safety tools of these final weeks — trust it.